Li Mo, a modern construction site technician, was reborn as the "silly wood" who was ridiculed in the Tang Dynasty. The family is surrounded by walls, oppressed by bullies, and the whole village is waiting to see his jokes. No one expected that this little carpenter, who couldn't even speak clearly, had technology in his mind that exceeded a thousand years. Starting from a Luban ruler, he built bridges with cement, shocked the world with glass, and worshiped gods with water. When everyone knelt down and begged him to accept a disciple, Li Mo only said: "This matter is not difficult."